The charity event, originally themed as a race against similar teams from the U.S. and the Commonwealth, was created to raise funds and awareness for groups involved in helping wounded military veterans. The race portion was called off after difficult terrain and stressful conditions forced the teams to work together to achieve their goal.

"We always knew that this wasn't going to be easy, but that is what makes the challenge so exciting," said Ed Parker, the expedition's director and co-founder of the Walking With The Wounded charity.

"Our aim was to show that, despite injury, young men and women from our armed forces can still achieve great things.

"We came down here, determined to get 12 men and women, all injured in conflict, to the South Pole, and this is what we have done. The feeling is incredible."

In a voice blog just before reaching the South Pole, Harry said: "A half day on Friday and we get to the South Pole on Friday 13th — unlucky for some, lucky for us. The wind has dropped down, which is nice. I think everyone is feeling a bit tired but slowly getting into the rhythm. Only just got into the rhythm now and it has almost finished."

To date, this year's South Pole Allied Challenge has raised more than $160,000 for charity. Check out the promo video below.